Baby latch on too much

My baby is like that too.. He overfeeds and spits out his milk a lot after that. He comfort latches and he does that so that he could fall asleep. He latched for HOURS. It went on for a month, then I stopped getting him to be latched to sleep. Instead I time his feeds (max 15mins latch), hold him upright to burp and then pat him to sleep against my body. I give him milk more times but in small quantities basically. Your baby might also be going through a growth spurt and he's cluster feeding a lot.